Valve structure.



PATENTED MAY 21, 1907.

L. H. MARTELL. VALVE STRUCTURE. PPLIOATION FILED N provements in Valve Structures, of which imstem is formed 3 esca e of fluid about the valve-stem,'I ado t I construction be more effectively packed. f

' form uHon the stem a 55. a flUponthe outer portion of the valve stem TELL, residing at Ellwood City, in the county naccuracy due to wear of the parts.

- sentatlve of and from its seat,

two parts, 4 and 5, longitudinally movable 'the inner part, and,-mconsequence of the th screw-thread construction already described,

the slightest UNITED STATES PATENT OFFICE. Louis HENRY MARTELL, or ELLWOOD CITY, PENNSYLVANIA.

VALVE STRUCTURE.

Specification of Letters Patent. Application filed November 5, i904. Serial No. 231.592.

NO. 854,698. iratentecl May 21. 1907.

and adjacent to thechamber wall I form a coll lar, preferably an enlargement, 7, andsurrounding the stem and interposed between of Lawrence and State of Pennsylvania, a the collar and the chamber wall I place a citizen of the United States, have invented loose ring, 14, of inelastic -materia This or discovered certain new and useful Imring 14 bears upon the chamber wall and collar 7. bears-uponit, and the bearingsurfaces are in one case inclined or angularly arranged, .respecting'the axis of the stem.

As particularly shown in the drawing, ring To all whom 'nmty' concern:

Be it known that I, LoUIs IlENR-Y MAR- provements the following is a specification.

My invention concerns improved'means for sealing arotatable stem in its passage through a chamber wall and the object of my improvement is to overcome or eliminate 5 14 bears upon the chamber wall in a horizontal plane, but the coacting bearing surfaces of the ringand collar 7 are inclined to the axis of the stem; these surfaces are preferably, though notnecessarily curved, and of spherical contour. S ring Sholds a collar, wall in sealing contact. The advantages of this construction are obvious; in the first place, plate 14 may be. formed of any preferred material, and of a .material better suited to tight closure than the material of'which the chamber wall itself is ordinarily formed; furthermoreyplate 14 is capable of turning and also of sliding very slightly to compensate for slight inaccu-f racies and displacements produced by wear, while the sealing joint between collar and ring'is still maintained. A relative move ment of stem and collar may occur, Without breaking the seal.

I am aware of the proposed use of an elastic gasket or packing between s'ucha coller and the chamber Wall; but, aside from the relatively short life of such a gasket, and its adhesion to the stationary surface, my invention is clearly distinguished by the nature of e contact and the self-adjustment of the parts in consequence of Wear. I

I claim as myinvention:

1;" Means for sealing a-rotatable stem in its passage through a chamber wall which consists of a collar formed on the stem, a'nda loose ring of inelastic material surrounding said stem and interposed between said collar and the chamber wall, the bearing surfaces between said collar and ring being inclined to the axis of the stem, and the bearing surfacesbetween the chamber wall and ring being in a plane per endicular to the axis of the stein, and the c amber Well being of such area or extent as to permit lateral movement of' said ring thereon, substantially as described. i I F I 2. 'Means for sealing a rotatable stem in its passagethrough a chamber-wall which con- The accom anying drawing illustrates my invention app iedto a valve of familiar type; and, for present purposes, this valve is represtructures in which a rotatable stem passes through the. wall of a chamber, Where fluid'pressures Within and without are une ual. a

T e valve itself, '1, is arranged to move to and thus control the passage offluid through a conduit.- This valve is operated by a hand-wheel, 3, mounted upon the valve stem, 4, 5, which extends through the wall of the valve chamben. Thevalve provided with a suitably arranged screw-thread, which-enacts with .a thread in the body of the chamber, and by this'means rotation of the stem efiects the desiredto and fro movement of the valve.

orderto secure atight seal against the ring and chamber the I own expedient of forming the stem 1n 9 respecting one another, and so connected that rotation of the outer part effects a turning of a longitudinal movement of the inner part 5. The outer part4 of 'thejstem may by this 'Mynnprov'ement is directed to the means of packin 'or sealing the passage of this outer ortion o the valve stem through the cham r wall." 'It hasheretofore been common to collarand in the chama corres nding seat, and to hold the collar to its seat y spring-pressure. 'But, in structures of this character heretofore emloyed, the parts though tight when .new come leaky-in continued service, because bend or distortion or inequality 1n the wearing away of parts will disturb the nicety of fitting,

'Ioo

her we sists of a collar formed on said stein having a placement of said ring thereon, substantially 1o bearing surface of curved 'contour, and a as described. v 1 loose ring of inelastic material surrounding; In testimony whereof, I have hereunto set said stem interposed between said collar and iny'hand. the char nber wall having a curved bearing LOU 1S IHIENRY MAI-{TELL surlace lor said collar, and abutting against said chamber wall in a plane perpendicular Witnesses:

to the axis of said stein, said chamber wall BAYA'R!) ll. Unius'lfi',

being of such extent as to permit lateral dis- Gimmes BARNE'H. 

